Rivet set or snap



Sept. Z6, 1944'. J. J.. SULLIVAN I 2,358,885

` v RIVM` SET 0R SNA? Filed Aug'. 13, 1943 Patented Sept. 2, 1944 UNITED YSTATESY PATENT OFFICE f AApplication August 13, 1943, Serial No. 498,529 1 claim. (c1. 279-19) This invention relates in general to an improved rivet set or snap for pneumatic riveting hammers, and in particular the invention comprises an improved rivet set or snap, and retainer, in novel assembly.

It is an object of this invention to provide a snap fonmed with a laterally openinginwardly and rearwardly inclined socket; there being a snap retainer which includes a rearwardly tensioned hook-like finger adapted to removably and matchingly engage in said socket.

Another object is to provide a snap and retainer assembly which includes a tension spring arranged to permit the snap, when the hammer is in use, to play out to a certain extent as iS-desirable; there being stop means to limit the extent to which said snap can'play out, and whereby to prevent its escape from the tool.

A further object of this invention is to provide an improvedl snap and retainer assembly which includes a flexible element extending lengthwise of the pneumatic hammer, one end of such flexible element 'being connected to the tool adjacent the handle thereof, means connecting the other end of the flexible element with the snap, and a loaded tension spring interposed in eiective relation in said exible element.

A still further object of the invention is to provide a snap and retainer assembly, as above, in which the flexible element is continuous and includes a normally slack portion or loop therein extending between the ends of the spring; said loop being of a length shorterthan the maximum length of play of the snap in the retaining barrel, whereby to limit play of the snap to an extent so that the same'cannot escape from the retaining barrel.

An additional object of this invention is to provide a snap and retainer assembly for a pneumatic hammer, comprising a length of exible cord'adapted at one end for connection with the hammer adjacent its supporting handle, said cord having an'elefrnentV connected therewith at its other end and arranged for connection with the snap; there being a normally slack loop in the cord intermediate its ends and a tension spring connected across said loop whereby to normally maintain the cord under tension.

A further object of the invention is to produce a simple and inexpensive device, and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal ofthe following specication and claim.

The gure'of the drawing is a side elevation of pneumatic riveting hammer incorporating the present invention; said .hammer being shown partly in section.

Referring now more particularly to the characters of reference on the drawing, the numeral I indicates generally a pneumatic riveting hammer which includes, at its rear end, a handle 2 on which is mounted the actuating trigger 3; said tool being adapted for connection with an air pressure supply hose by means of a coupling 4. At its forward end the hammer I is provided with a'barrel 5 formed with a bore 6 open to the forward end of the gun and into which bore the n shank 1 of a snap or rivet set, indicated generally at 8, is adapted to slidably engage. This snap or rivet set 8 includes a head 9 and a barrel engaging flange III.

The snap retainer includes a length of flexible cord Il adapted to be tied, as at I2, to the handle 2 of the tool and to thence extend forwardly to a termination alongside the b-arrel 5; said cord being formed at its forward end with an eye I3.

A connector element I4, of heavy gauge rigid wire, connects between the eye I3 and the head 9 of the snap 8; said connector element including a forwardly opening hook I5 which engages at its rear end through eye I3, and a rearwardly diverging laterally extending linger I6 at its forward end removably seating in a matching socket I1 drilled in one side of the head 9 of the snap.

Intermediate its ends the cord II is formed with a normally slack portion or loop I8, the ends of which loopare defined by knots I9. A normally loaded tension spring 20 is connected across the inner end of loop I8 with the end hooks 2l of spring 20 encircling the cord beneath or on opposite sides of corresponding knots I9, whereby to normally maintain the cord II relatively taut, The loop I8 is of a length slightly shorter than the length of shank 1 so that when the tool is in operation and the snap is permitted to play out from the barrel 5 against the tension of spring 20, said shank cannot escape from the barrel, as the loop will limit extension of the spring before the shank can leave the barrel.

To disconnect the above describedsnap retainer from the riveting hammer, for replacement or repair of the snap or rivet set,V it is only necessary to withdraw the finger I6 from socket Il, whereupon the snap can be readily detached from the tool. When the toolis in operation the Having thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is:

A snap and retainer assembly for a penumatic hammer, comprising a snap having a laterally opening inwardly and rearwardly inclined socket therein, Aand a, snap retainer which includes, under rearward tension, a forwardly yieldable hook-like finger removably and matchingly en- 10 gaging in said socket.

JAMES J. SULLIVAN. 

